The star, who was taken off probation from her 2007 Beverly Hills DUI case Thursday, let her hair down that evening during an intimate and low-key gathering at West Hollywood celeb hot spot, Chateau Marmont.

Lohan's rep, rep Steve Honig tells Us Weekly that Lohan, 25, was joined by her family, agents, managers, attorneys and her sister Ali, 18, in one of the hotel's bungalows, where the group dined on paella while watching a showing of Elizabeth Taylor's Who’s Afraid of Virginia Woolf?.

"It was a get-together to say thank you to everyone who supported her through this whole thing," Honig says. "It was a quiet party — not a rowdy night as some people might make it out to seem."

Though her DUI case is now behind her, the Mean Girls actress will remain on probation for her necklace theft until May 24, 2014. "The only terms left for you on that case are to obey all laws. Not that hard," Judge Stephanie Sautner said during the star's L.A. court appearance Thursday morning.

Lohan, who smiled and mouthed, "Oh my God!" after Sautner delivered the good news, said, "I just want to say thank you for being fair. It's really opened a lot of doors for me, so I really appreciate it."